Dwyer Series AT2MS Magnesense® Differential Pressure Transmitter

Part Number: Series AT2MS Category:

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The Dwyer ATEX/IECEx Series AT2MS Magnesense® Differential Pressure Transmitter is a highly versatile transmitter for monitoring air velocity and pressure in hazardous areas. This AT2MS transmitter is loaded with features such as field selectable English or metric ranges, field upgradeable LCD display, adjustable dampening of the output signal and the ability to select a square root output for use with pitot tubes and other similar flow sensors. Along with these features, the magnetic sensing technology provides exceptional long term performance and enables the Magnesense® transmitter to be the solution for a myriad of pressure and flow applications. Flame-proof enclosures are available in aluminium and can include a glass window for viewing process on the LCD.

Installation Precaution:
• Cables must be fitted through 1/2″ NPT cable gland or ATEX/IECEx conduit (not included with instrument).
• Make sure after cabling to close tight cover and cable gland, to maintain IP66 rating (IP65 with option OPV, overpressure relief valve).
• De-energizing the instrument before opening the cover.
• Attention: Check local safety rules and warnings on unit and manual for the correct use of the instrument in the hazardous area.

Please see SERIES MS for non-ATEX/IECEx approved.

Product Applications

  • Monitor pressures in ducts, rooms, or total building pressures
  • Filter monitoring
  • Local indication of cleanroom pressures with process signal sent to control room
  • Hazardous area pressure measurement and transmitter

Service : Air and non-combustible, compatible gases.

Wetted Materials : Consult factory.

Accuracy : MS-X21: 0.5 in w.c. & 0.25 in w.c.: ±1%; 0.1 in w.c.: ±2%; 100 Pa & 50 Pa: ±1%; 25 Pa: ±2%. MS-X11: 5 in w.c. & 2 in w.c.: ±1%; 1 in w.c.: ±2%; 1250 Pa & 500 Pa: ±1%; 250 Pa: ±2% (@ standard conditions).

Stability : ±1% FS/year.

Temperature Limits : 0 to 150°F (-18 to 66°C); (Note: Product temperature limits differ from case).

Pressure Limits : 1 psi maximum, operation; 10 psi, burst.

Power Requirements : 10 to 35 VDC (2-wire); 17 to 36 VDC or isolated 21.6 to 33 VAC (3-wire).

Output Signals : 4 to 20 mA (2-wire); 0 to 5 V, 0 to 10 V (3-wire).

Response Time : Field adjustable 0.5 to 15 sec. time constant. Provides a 95% response time of 1.5 to 45 seconds.

Zero & Span Adjustments : Digital push button. In safe zone only.

Loop Resistance : Current output: 0 to 1250 ohm max.; Voltage output: min. load resistance 1 k ohm.

Current Consumption : 40 mA max. Display: 4 digit LCD.Display:4 digit LCD.

Electrical Wiring : 4 to 20 mA, 2-wire: European style terminal block for 16 to 26 AWG. 0 to 10 V, 3-wire: European style terminal block 16 to 22 AWG.

Mounting Orientation : Diaphragm in vertical position.

Enclosure Rating : 4X IP66, IP65 with option OPV overpressure relief valve.

Housing Material : Aluminum.

Finishing : Texture epoxy coat RAL7038.

Pressure Connections : 1/8″ NPT female brass (SS optional). In presence of acetylene it is necessary to use SS.

Electrical Connections : Two 1/2″ FNPT. Cable gland not included.

Weight : 11 lb (5 kg).

ATEX Certificate : BVI 14ATEX0072.

Agency Approvals : ATEX Compliant CE 1370 Ex II 2G Ex d IIC T6 Gb / II 2D Ex tb IIIC T85°C Db, -60°C=Tamb=+60°C IECEx Compliant: Ex d IIC T6 Gb / Ex tb IIIC T85°C Db

  • ATEX housing provides all the capabilities and value of the MS2 in a flame & explosion-proof enclosure
  • Durable and rugged housing and high-quality components combined provide long service life and minimized down-time
  • High impact strength and high temperature rated for applications where hazardous environments exist

Datasheet: Series AT2MS Catalog Page

Manual: Instruction Manual | Instruction Manual (Low Pressure Ranges)

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